JP2012250452A - Channel repairing member and channel using the same, and method of manufacturing channel repairing member - Google Patents

Channel repairing member and channel using the same, and method of manufacturing channel repairing member Download PDF

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JP2012250452A
JP2012250452A JP2011125017A JP2011125017A JP2012250452A JP 2012250452 A JP2012250452 A JP 2012250452A JP 2011125017 A JP2011125017 A JP 2011125017A JP 2011125017 A JP2011125017 A JP 2011125017A JP 2012250452 A JP2012250452 A JP 2012250452A
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pipe
repair member
reinforcing fiber
yarn
diameter
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JP5829054B2 (en
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Koichiro Kakehashi
晃一郎 梯
Keishi Murakami
経司 村上
Satoshi Ochi
聡 越智
Tomoaki Hori
智明 堀
Hideki Omuro
秀樹 大室
Shoji Kawaguchi
昭次 川口
Masamichi Okada
正道 岡田
Noriaki Nakamura
憲章 中村
Iori Nakabayashi
伊織 中林
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Du Pont Toray Co Ltd
Kubota CI Co Ltd
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Du Pont Toray Co Ltd
Kubota CI Co Ltd
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  • Pipe Accessories (AREA)
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  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a new channel repairing member, a channel using the same and a method of manufacturing the channel repairing member; to provide a channel repairing member which is reinforced with a reinforcing fiber and besides can be diametrically enlarged and has reduced cost; and to provide a channel using the channel repairing member and a method of manufacturing the channel repairing member.SOLUTION: The channel repairing member 10 includes a pipe body 12 and the reinforcing fiber 14, and is diametrically enlarged in an existing channel 100 to be closely adhered to the inner surface of the existing channel, thereby repairing the existing channel 100. The reinforcing fiber 14 is a composite yarn including a core yarn (22) formed from a general fiber and a sheath yarn (24) formed from a high strength fiber and wound around the outer surface of the core yarn (22), and is wound around a pipe wall part of the pipe body 12 in the peripheral direction. When the channel repairing member 10 is diametrically enlarged, the core yarn (22) is elongated or broken and accordingly, the spiral shaped sheath yarn (24) is deformed to become longer into a straight line, consequently the channel repairing member 10 can be diametrically enlarged. The channel repairing member, which is reinforced with the reinforcing fiber and besides can be diametrically enlarged and has reduced cost, is thereby provided.

Description

この発明は管路補修部材およびそれを用いた管路ならびに管路補修部材の製造方法に関し、特にたとえば、既設管路内に挿通された後、拡径されて既設管路の内面に密着される、管路補修部材およびそれを用いた管路ならびに管路補修部材の製造方法に関する。   The present invention relates to a pipe repair member, a pipe using the pipe repair method, and a method for manufacturing the pipe repair member. In particular, for example, after being inserted into an existing pipe, the diameter is expanded and the inner face of the existing pipe is adhered. The present invention relates to a pipe repair member, a pipe using the pipe repair member, and a method for manufacturing the pipe repair member.

従来のこの種の管路補修部材の一例が特許文献1に開示されている。特許文献1の管路補修部材(管路の補修用管体)では、筒状織布の内外面に熱可塑性樹脂の被覆層を形成し、これら内外の被覆層同士を筒状織布の布目を通して一体化させている。そして、筒状織布のよこ糸には、ガラス繊維などの高剛性糸が使用され、筒状織布は、補修用管体が拡径できるように、周方向に織り縮み形状を有している。   An example of a conventional pipe repair member of this type is disclosed in Patent Document 1. In the pipe repair member (pipe repair pipe body) of Patent Document 1, a coating layer of a thermoplastic resin is formed on the inner and outer surfaces of a tubular woven fabric, and the inner and outer coating layers are formed on the cloth of the tubular woven fabric. It is integrated through. The weft yarn of the tubular woven fabric is made of a high-rigidity yarn such as glass fiber, and the tubular woven fabric has a woven and shrunk shape in the circumferential direction so that the diameter of the repair pipe can be expanded. .

また、特許文献2には、鋳鉄管や鋼管等の金属パイプの代替として用いられるプラスチックパイプに関する技術が開示されている。特許文献2のプラスチックパイプでは、プラスチックからなる導管と防食層との間に補強用シートが配置されている。この補強用シートは、芳香族ポリアミド繊維などの高強度繊維によって形成される複数の補強繊維フィラメント束が、合成樹脂製の保持シートの表面に対して平行かつ直線状に配列した状態で貼り付けられて形成されている。
特許第3473801号公報 [B29C 63/34] 特許第3540205号公報 [F16L 11/00]
Patent Document 2 discloses a technique related to a plastic pipe used as an alternative to a metal pipe such as a cast iron pipe or a steel pipe. In the plastic pipe of Patent Document 2, a reinforcing sheet is disposed between the conduit made of plastic and the anticorrosion layer. This reinforcing sheet is affixed in a state where a plurality of reinforcing fiber filament bundles formed of high-strength fibers such as aromatic polyamide fibers are arranged in parallel and linearly with the surface of the synthetic resin holding sheet. Is formed.
Japanese Patent No. 3473801 [B29C 63/34] Japanese Patent No. 3540205 [F16L 11/00]

特許文献1の技術では、補修用管体の補強用に筒状織布を用いているが、繊維を円筒状に織るための設備は、特殊かつ高価なものである。また、筒状織布の内外層に被覆層を均等に形成することも難しく、その設備も特殊かつ高価なものが必要となる。つまり、特許文献1の補修用管体は、製造することが難しく、設備コストも大きくなってしまう。   In the technique of Patent Document 1, a tubular woven fabric is used for reinforcing the repair pipe, but the equipment for weaving the fibers in a cylindrical shape is special and expensive. In addition, it is difficult to uniformly form the coating layer on the inner and outer layers of the tubular woven fabric, and the equipment is also special and expensive. That is, the repair pipe body of Patent Document 1 is difficult to manufacture and the equipment cost is increased.

また、特許文献2の技術では、補強繊維フィラメント束が、高強度を有する単一材料の連続体によって形成されており、プラスチックパイプの周方向の伸長が規制されている。つまり、特許文献2のプラスチックパイプは、拡径させることが困難であるので、既設管路内で拡径して既設管路に密着させる管路補修工法に用いる管路補修部材には適用できない。   Moreover, in the technique of patent document 2, the reinforcement fiber filament bundle is formed by the continuous body of the single material which has high intensity | strength, and the expansion | extension of the circumferential direction of a plastic pipe is controlled. That is, since it is difficult to increase the diameter of the plastic pipe of Patent Document 2, it cannot be applied to a pipe repair member used in a pipe repair method in which the diameter is increased in an existing pipe and is in close contact with the existing pipe.

それゆえに、この発明の主たる目的は、新規な、管路補修部材およびそれを用いた管路ならびに管路補修部材の製造方法を提供することである。   Therefore, the main object of the present invention is to provide a novel pipe repair member, a pipe using the pipe repair member, and a method for manufacturing the pipe repair member.

この発明の他の目的は、補強繊維によって補強しながらも拡径可能であり、かつコストを低減できる、管路補修部材およびそれを用いた管路ならびに管路補修部材の製造方法を提供することである。   Another object of the present invention is to provide a pipe repair member, a pipe using the same, and a method of manufacturing the pipe repair member that can be expanded in diameter while being reinforced with a reinforcing fiber and can be reduced in cost. It is.

この発明は、上記の課題を解決するために、以下の構成を採用した。なお、括弧内の参照符号および補足説明などは、本発明の理解を助けるために後述する実施の形態との対応関係を示したものであって、この発明を何ら限定するものではない。   The present invention employs the following configuration in order to solve the above problems. Note that reference numerals in parentheses and supplementary explanations indicate correspondence with embodiments described later in order to help understanding of the present invention, and do not limit the present invention.

第1の発明は、既設管路内に挿通された後、拡径されて既設管路の内面に密着される管路補修部材であって、熱可塑性樹脂によって形成される管本体、および管本体の管壁部に配置されて、当該管本体の周方向に巻回される補強繊維を備え、補強繊維は、拡径時に伸長または破断する芯糸、および高強度繊維によって形成され、芯糸の外面に巻き付けられる鞘糸を含む、管路補修部材である。   A first invention is a pipe repair member that is inserted into an existing pipe line, then expanded in diameter and is in close contact with the inner surface of the existing pipe line, and is formed by a thermoplastic resin. Provided with a reinforcing fiber wound around the pipe body in the circumferential direction, and the reinforcing fiber is formed of a core yarn that expands or breaks when the diameter is expanded, and a high-strength fiber. It is a pipe line repair member containing the sheath thread wound around an outer surface.

第1の発明では、管路補修部材(10)は、管本体(12)および補強繊維(14)を備え、既設管路(100)内に挿入された後に拡径されて、既設管路の内面と密着することによって、既設管路を補修する。管本体は、熱可塑性樹脂によって形成される。また、補強繊維は、管本体の管壁部、たとえば管壁内部や管壁外面に配置されるものであり、管本体の周方向に巻回される。補強繊維としては、芯糸(22)と芯糸の外面に巻き付けられる鞘糸(24)とによって形成される複合糸が用いられる。芯糸は、ナイロンやポリエステル等の一般繊維によって形成され、施工時において管路補修部材が拡径されたときに、伸長または破断するものである。すなわち、芯糸を形成する繊維としては、管路補修部材の拡径時の条件、一例として90−100℃程度の高温下において0.05−0.5MPa程度の圧力が加えられたときに、容易に伸長または破断する繊維が用いられる。鞘糸は、拡径後(施工後)の管路補修部材の強度および耐圧性を保持するものであり、芳香族ポリアミド繊維やガラス繊維などの高強度繊維によって形成される。ここで、高強度繊維とは、10cN/dtex以上の引張強度を有する繊維をいう。施工時に管路補修部材が拡径される際には、芯糸が伸長または破断し、それに伴って鞘糸が真っ直ぐに伸びるように変形することによって、管路補修部材が拡径可能となる。   In the first invention, the pipe repair member (10) includes a pipe main body (12) and a reinforcing fiber (14), and is expanded in diameter after being inserted into the existing pipe line (100). Repair existing pipes by making close contact with the inner surface. The tube body is made of a thermoplastic resin. Further, the reinforcing fiber is disposed on the tube wall portion of the tube main body, for example, the inside of the tube wall or the outer surface of the tube wall, and is wound in the circumferential direction of the tube main body. As the reinforcing fiber, a composite yarn formed by the core yarn (22) and the sheath yarn (24) wound around the outer surface of the core yarn is used. The core yarn is formed of general fibers such as nylon and polyester, and is stretched or broken when the diameter of the pipe repair member is expanded during construction. That is, as the fiber forming the core yarn, the condition at the time of diameter expansion of the pipe repair member, for example, when a pressure of about 0.05-0.5 MPa is applied at a high temperature of about 90-100 ° C. Fibers that easily stretch or break are used. The sheath yarn retains the strength and pressure resistance of the pipe repair member after diameter expansion (after construction), and is formed of high-strength fibers such as aromatic polyamide fibers and glass fibers. Here, the high strength fiber means a fiber having a tensile strength of 10 cN / dtex or more. When the diameter of the pipe repair member is expanded during construction, the pipe repair member can be expanded by deforming so that the core thread extends or breaks, and the sheath thread extends along with it.

第1の発明によれば、補強繊維によって補強しながらも周方向に拡径可能な補修管路部材を提供できる。また、円筒状に織った補強繊維を製作する必要がないので、コストを低減でき、口径の大きい補修管路部材も比較的容易に製造できる。   According to the first aspect of the present invention, it is possible to provide a repair pipeline member that can be expanded in the circumferential direction while being reinforced with reinforcing fibers. Further, since it is not necessary to manufacture a reinforcing fiber woven in a cylindrical shape, the cost can be reduced, and a repair pipe member having a large diameter can be manufactured relatively easily.

第2の発明は、第1の発明に従属し、拡径時の最大径が、鞘糸の周当たりの実効長によって規定される。   The second invention is dependent on the first invention, and the maximum diameter at the time of diameter expansion is defined by the effective length per circumference of the sheath yarn.

第2の発明では、管路補修部材(10)の拡径時の最大径は、鞘糸(24)の周当たりの実効長(軸垂直方向の長さまたは断面投影長さ)によって規定される。したがって、既設管路の内面に対して管路補修部材を適切に密着させることができる。   In the second invention, the maximum diameter when the pipe repair member (10) is expanded is defined by the effective length (the length in the direction perpendicular to the axis or the cross-sectional projection length) per circumference of the sheath yarn (24). . Therefore, the pipe line repair member can be properly adhered to the inner surface of the existing pipe line.

第3の発明は、第1または第2の発明に従属し、管路補修部材は、所定温度で加熱して前記拡径を行うものであり、芯糸の軟化温度は、前記所定温度以下であり、鞘糸の軟化温度は、前記所定温度より高い。   3rd invention is dependent on 1st or 2nd invention, a pipe line repair member heats at the predetermined temperature, and performs the said diameter expansion, The softening temperature of a core thread is below the said predetermined temperature Yes, the softening temperature of the sheath yarn is higher than the predetermined temperature.

第3の発明では、管路補修部材(10)は、所定温度で加熱することによって拡径される。芯糸(22)は、その所定温度(加熱温度)以下の軟化温度を有する繊維によって形成され、鞘糸(24)は、その所定温度より高い軟化温度を有する繊維によって形成される。   In 3rd invention, a pipe line repair member (10) is diameter-expanded by heating at predetermined temperature. The core yarn (22) is formed of a fiber having a softening temperature equal to or lower than a predetermined temperature (heating temperature), and the sheath yarn (24) is formed of a fiber having a softening temperature higher than the predetermined temperature.

第3の発明によれば、管路補修部材の拡径時に芯糸が軟化するので、芯糸が拡径時に伸長または破断し易くなり、管路補修部材をより容易に拡径させることができる。   According to the third invention, since the core yarn is softened when the diameter of the pipe repair member is expanded, the core thread is easily stretched or broken when the diameter is expanded, and the diameter of the pipe repair member can be expanded more easily. .

第4の発明は、第1ないし第3のいずれかの発明に従属し、補強繊維は、管本体の管軸方向に対して少なくとも内外2層に周方向に巻回される。   A fourth invention is dependent on any one of the first to third inventions, and the reinforcing fiber is wound in the circumferential direction on at least two inner and outer layers with respect to the tube axis direction of the tube body.

第4の発明では、補強繊維(14)は、管本体(12)の管軸方向に対して、内外の少なくとも2層に周方向に巻回される2方向巻き(左右巻き)とされる。   In the fourth invention, the reinforcing fiber (14) is a two-way winding (left and right winding) wound in the circumferential direction on at least two layers inside and outside the tube axis direction of the tube body (12).

第4の発明によれば、管路補修部材の強度および耐圧性を向上させることができる。   According to the fourth invention, the strength and pressure resistance of the pipeline repair member can be improved.

第5の発明は、第1ないし第4のいずれかの発明に従属し、補強繊維は、シート状に形成された後に管本体の管壁部に配置される。   A fifth invention is dependent on any one of the first to fourth inventions, and the reinforcing fiber is formed in a sheet shape and then disposed on the tube wall portion of the tube body.

第5の発明では、補強繊維(14)を用いて補強繊維シート(30)を形成した後、その補強繊維シートを管本体(12)に対して周方向に巻回すことによって、補強繊維が管本体の周方向に巻回される。たとえば、補強繊維シートとしては、少なくとも経糸の一部に補強繊維を使用して平織りしたものが用いられる。   In the fifth invention, after the reinforcing fiber sheet (30) is formed using the reinforcing fiber (14), the reinforcing fiber sheet is wound around the pipe body (12) in the circumferential direction, so that the reinforcing fiber is piped. It is wound in the circumferential direction of the main body. For example, as the reinforcing fiber sheet, at least a part of the warp is plain woven using reinforcing fibers.

第6の発明は、第1ないし第5のいずれかの発明に従属し、管本体の管壁部に配置されて管軸方向に延びる高強度糸をさらに備える。   A sixth invention is dependent on any one of the first to fifth inventions, and further includes a high-strength yarn disposed on the tube wall portion of the tube body and extending in the tube axis direction.

第6の発明では、管本体(12)の管壁部には、補強繊維(14)に加えて、管軸方向に直線状に延びる高強度糸(32)が設けられる。高強度糸は、鞘糸(24)と同様に、芳香族ポリアミド繊維やガラス繊維などの高強度繊維によって形成される。   In the sixth invention, the tube wall portion of the tube body (12) is provided with a high-strength yarn (32) extending linearly in the tube axis direction in addition to the reinforcing fibers (14). The high-strength yarn is formed of high-strength fibers such as aromatic polyamide fibers and glass fibers, similarly to the sheath yarn (24).

第6の発明によれば、管軸方向の伸びが規制されるので、既設管路内に引き込まれる際に破断し難くなる。   According to the sixth invention, since the elongation in the tube axis direction is restricted, it is difficult to break when drawn into the existing pipeline.

第7の発明は、第1ないし第6のいずれかの発明の管路補修部材を用いて内面を補修した管路である。   A seventh invention is a pipeline whose inner surface is repaired by using the pipeline repair member of any one of the first to sixth inventions.

第7の発明においても、第1ないし第6のいずれかの発明と同様の作用効果を示すと共に、既設管路と管路補修部材とが協働することによって、内圧および外圧に耐え得る強度および耐圧性を有する管路を提供できる。   In the seventh invention as well, the same effects as those of any of the first to sixth inventions are exhibited, and the existing pipe line and the pipe line repairing member cooperate with each other to have a strength that can withstand internal pressure and external pressure. A pipeline having pressure resistance can be provided.

第8の発明は、既設管路に挿通された後、拡径されて既設管路の内面に密着される管路補修部材の製造方法であって、(a)拡径時に伸長または破断する芯糸と、高強度繊維によって形成されて芯糸の外面に巻き付けられる鞘糸とによって形成される補強繊維を製作するステップ、(b)熱可塑性樹脂によって形成される円筒状の内層を形成するステップ、および(c)ステップ(a)で製作した補強繊維をステップ(b)で形成した内層の外面に周方向に巻回するステップを含む、管路補修部材の製造方法である。   The eighth invention is a method of manufacturing a pipe repair member that is inserted into an existing pipe and then expanded in diameter and is in close contact with the inner surface of the existing pipe, and (a) a core that expands or breaks when the diameter is expanded Producing a reinforcing fiber formed by a yarn and a sheath yarn formed by high-strength fibers and wound around the outer surface of the core yarn; (b) forming a cylindrical inner layer formed by a thermoplastic resin; And (c) a method of manufacturing a pipe repair member, including the step of winding the reinforcing fiber manufactured in step (a) around the outer surface of the inner layer formed in step (b) in the circumferential direction.

第8の発明では、ステップ(a)において、たとえば、複数本の一般繊維を下撚りして芯糸(22)を形成すると共に、複数本の高強度繊維を下撚りして鞘糸(24)を形成し、芯糸の外面に鞘糸を螺旋状に巻き付けることによって、補強繊維(14)を製作する。そして、ステップ(b)において、たとえば硬質ポリエチレン等の熱可塑性樹脂を円筒状に押し出して内層(18)を形成し、ステップ(c)において、形成した内層の外面に対して補強繊維を周方向に巻回すことによって、管路補修部材(10)を製造する。なお、内層に巻き付けた補強繊維の外側に硬質ポリエチレン等の熱可塑性樹脂をさらに被覆して外層(20)を形成することもできる。   In the eighth invention, in step (a), for example, a plurality of ordinary fibers are twisted to form a core yarn (22), and a plurality of high-strength fibers are twisted to form a sheath yarn (24). The reinforcing fiber (14) is manufactured by winding the sheath yarn spirally around the outer surface of the core yarn. In step (b), for example, a thermoplastic resin such as hard polyethylene is extruded into a cylindrical shape to form the inner layer (18). In step (c), the reinforcing fibers are arranged in the circumferential direction on the outer surface of the formed inner layer. A pipe line repair member (10) is manufactured by winding. The outer layer (20) can also be formed by further coating a thermoplastic resin such as hard polyethylene on the outside of the reinforcing fiber wound around the inner layer.

第8の発明によれば、補強繊維によって補強しながらも周方向に拡径可能な補修管路部材を低コストで製造できる。また、口径の大きい補修管路部材も比較的容易に製造できる。   According to the eighth aspect of the invention, it is possible to manufacture a repair conduit member that can be expanded in the circumferential direction while being reinforced with the reinforcing fiber at a low cost. In addition, a repair pipe member having a large diameter can be manufactured relatively easily.

この発明によれば、補強繊維によって補強しながらも周方向に拡径可能な補修管路部材を提供できる。また、円筒状に織った補強繊維を製作する必要がないので、コストを低減でき、口径の大きい補修管路部材も比較的容易に製造できる。   According to this invention, it is possible to provide a repair conduit member that can be expanded in the circumferential direction while being reinforced with reinforcing fibers. Further, since it is not necessary to manufacture a reinforcing fiber woven in a cylindrical shape, the cost can be reduced, and a repair pipe member having a large diameter can be manufactured relatively easily.

この発明の上述の目的、その他の目的、特徴および利点は、図面を参照して行う後述の実施例の詳細な説明から一層明らかとなろう。   The above object, other objects, features, and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

この発明の一実施例の管路補修部材を用いて管路を補修するときの管路補修部材の動作を示す図解図であり、(A)は既設管路内への管路補修部材の挿入時の様子を示し、(B)は管路補修部材の拡径途中の様子を示し、(C)は既設管路の内面に管路補修部材が密着した様子を示す図解図である。It is an illustration figure which shows operation | movement of the pipe repair member when repairing a pipe line using the pipe repair member of one Example of this invention, (A) is insertion of the pipe repair member in the existing pipe line The state of time is shown, (B) shows the state in the middle of diameter expansion of a pipe line repair member, (C) is an illustration figure which shows a mode that the pipe line repair member closely_contact | adhered to the inner surface of the existing pipe line. 図1の管路補修部材を示す断面図である。It is sectional drawing which shows the pipe line repair member of FIG. 補強繊維の配置態様を説明するために外層の一部を省略した管路補修部材を示す図解図である。It is an illustration figure which shows the pipe line repair member which abbreviate | omitted a part of outer layer in order to demonstrate the arrangement | positioning aspect of a reinforcement fiber. 補強繊維の外観を示す図解図である。It is an illustration figure which shows the external appearance of a reinforced fiber. 管路補修部材の拡径時における補強繊維の動作の一例を模式的に示す図解図である。It is an illustration figure which shows typically an example of operation | movement of the reinforcement fiber at the time of diameter expansion of a pipe line repair member. 撚り数を変更した際の補強繊維の伸び率と引張強さとの関係を示すグラフである。It is a graph which shows the relationship between the elongation of the reinforcement fiber at the time of changing the number of twists, and tensile strength. 管路補修部材の製造装置の一例を示す図解図である。It is an illustration figure which shows an example of the manufacturing apparatus of a pipe line repair member. この発明の管路補修部材の他の実施例において、外層の一部および外側の補強繊維の一部を省略した管路補修部材を示す図解図である。It is an illustration figure which shows the pipe line repair member which abbreviate | omitted a part of outer layer and a part of outer side reinforcement fiber in the other Example of the pipe line repair member of this invention. この発明の管路補修部材のさらに他の実施例において、外層の一部を省略した管路補修部材を示す図解図である。In the further another Example of the pipeline repair member of this invention, it is an illustration figure which shows the pipeline repair member which abbreviate | omitted a part of outer layer. この発明の管路補修部材のさらに他の実施例において、外層の一部を省略した管路補修部材を示す図解図である。In the further another Example of the pipeline repair member of this invention, it is an illustration figure which shows the pipeline repair member which abbreviate | omitted a part of outer layer.

図1を参照して、この発明の一実施例である管路補修部材10は、上下水道、農業用水路、工業用水路およびガス管路などの既設管路100を補修するためのものであり、既設管路100内に挿入された後に拡径されて、既設管路100の内面と密着することによって、既設管路100を補修する。詳細は後述するように、管路補修部材10は、補強繊維14によって補強されているので、上述の既設管路100の中でも特に、内圧が作用する地下埋設の既設管路100(内圧管)の補修に好適に用いられる。   Referring to FIG. 1, a pipe repair member 10 according to an embodiment of the present invention is for repairing an existing pipe 100 such as a water and sewage system, an agricultural waterway, an industrial waterway, and a gas pipe. The diameter of the existing pipeline 100 is expanded after being inserted into the pipeline 100, and the existing pipeline 100 is repaired by being in close contact with the inner surface of the existing pipeline 100. As will be described in detail later, since the pipe repair member 10 is reinforced by the reinforcing fibers 14, the underground pipe 100 (internal pressure pipe) embedded in the underground where the internal pressure acts is particularly the above-described existing pipe 100. It is suitably used for repair.

なお、補修する既設管路100の材質は、特に限定されず、管路補修部材10は、鉄筋コンクリート管、陶管、鋳鉄管、鋼管および合成樹脂管などの様々な既設管路100の補修に適用可能である。また、補修する既設管路100の大きさは、特に限定されないが、管路補修部材10は、呼び径(内径)が75−700mmであって、補修長さが数m−数100mである既設管路100の補修に好適に用いられる。   The material of the existing pipeline 100 to be repaired is not particularly limited, and the pipeline repair member 10 is applied to repair of various existing pipelines 100 such as reinforced concrete pipes, ceramic pipes, cast iron pipes, steel pipes and synthetic resin pipes. Is possible. The size of the existing pipeline 100 to be repaired is not particularly limited, but the pipeline repair member 10 has a nominal diameter (inner diameter) of 75 to 700 mm and a repair length of several meters to several hundred meters. It is suitably used for repairing the pipe line 100.

図2に示すように、管路補修部材10は、硬質ポリエチレンや硬質ポリ塩化ビニル等の熱可塑性樹脂によって形成される円筒状の管本体12、および管本体12の管壁内部に配置される補強繊維14を備える。すなわち、管路補修部材10は、補強繊維14を含む中間層16の内面および外面を、熱可塑性樹脂によって形成される内層18および外層20によって被覆した三層構造を有する長尺の筒状体である。この実施例では、熱可塑性樹脂は、高密度ポリエチレン樹脂である。   As shown in FIG. 2, the pipe repair member 10 includes a cylindrical pipe body 12 formed of a thermoplastic resin such as hard polyethylene or hard polyvinyl chloride, and a reinforcement disposed inside the pipe wall of the pipe body 12. Fiber 14 is provided. That is, the pipe repair member 10 is a long cylindrical body having a three-layer structure in which the inner surface and the outer surface of the intermediate layer 16 including the reinforcing fibers 14 are covered with the inner layer 18 and the outer layer 20 formed of a thermoplastic resin. is there. In this embodiment, the thermoplastic resin is a high density polyethylene resin.

管路補修部材10の外径は、既設管路100の内径よりも少し小さめに設定され、施工時における拡径後に、既設管路100の内径と同じ大きさ(ほぼ同じ大きさを含む)となるように設定される。また、管路補修部材10の管壁全体の厚みは、その外径に応じて設定され、たとえば2−10mmである。具体的には、管路補修部材10の外径が150mmの場合、管壁全体の厚みは、たとえば3−4mm程度である。   The outer diameter of the pipe repair member 10 is set to be slightly smaller than the inner diameter of the existing pipe line 100, and after expanding the diameter at the time of construction, the same size (including almost the same size) as the inner diameter of the existing pipe line 100 Is set to be Moreover, the thickness of the whole pipe wall of the pipe line repair member 10 is set according to the outer diameter, for example, is 2-10 mm. Specifically, when the outer diameter of the pipe repair member 10 is 150 mm, the thickness of the entire pipe wall is, for example, about 3-4 mm.

補強繊維14は、図3に示すように、管本体12の周方向に巻回される。なお、図3では、補強繊維14が螺旋状に延びていることが分かりやすいように、隣り合う補強繊維14の間に間隔を形成しているが、隣り合う補強繊維14同士は、密に接していてもよいし、重なり合っていてもよい。もちろん、図3と同様に間隔が開くように配置してもよい。また、中間層16は、補強繊維14のみで形成されてもよいし、補強繊維14に加えて管本体12の管壁を形成する熱可塑性樹脂が含まれていてもよい。すなわち、内層18と外層20とが補強繊維14間を通る熱可塑性樹脂を介して一体化していてもよいし、内層18と外層20とが密に接する補強繊維14によって分断されていてもよい。   As shown in FIG. 3, the reinforcing fiber 14 is wound in the circumferential direction of the tube body 12. In FIG. 3, an interval is formed between adjacent reinforcing fibers 14 so that it can be easily understood that the reinforcing fibers 14 extend spirally, but the adjacent reinforcing fibers 14 are in close contact with each other. They may be overlapped with each other. Of course, it may be arranged so that the interval is wide as in FIG. The intermediate layer 16 may be formed of only the reinforcing fibers 14, or may include a thermoplastic resin that forms the tube wall of the tube body 12 in addition to the reinforcing fibers 14. That is, the inner layer 18 and the outer layer 20 may be integrated via a thermoplastic resin passing between the reinforcing fibers 14, or may be divided by the reinforcing fibers 14 in which the inner layer 18 and the outer layer 20 are in close contact.

図4は、補強繊維14の外観の一例を示す。図4を参照して、補強繊維14は、芯糸22および鞘糸(絡み糸)24によって形成される複合糸である。この実施例では、芯糸22は、棒状に形成され、その芯糸22の外面に沿って鞘糸24が巻き付けられる。   FIG. 4 shows an example of the appearance of the reinforcing fiber 14. Referring to FIG. 4, the reinforcing fiber 14 is a composite yarn formed by a core yarn 22 and a sheath yarn (entangled yarn) 24. In this embodiment, the core yarn 22 is formed in a rod shape, and the sheath yarn 24 is wound along the outer surface of the core yarn 22.

芯糸22は、施工時において管路補修部材10が拡径されるときに、伸長または破断するものである。すなわち、芯糸22を形成する繊維としては、管路補修部材10を拡径するときの条件において、伸長または破断する繊維が用いられる。一例として、所定温度での加熱(通常、この加熱温度は、管本体12の管壁を形成する熱可塑性樹脂が軟化し始める温度以上に設定される)および所定圧力での加圧によって拡径される管路補修部材10の場合には、芯糸22を形成する繊維としては、その拡径時の条件、たとえば90−100℃程度の高温下において0.05−0.5MPa程度の圧力が加えられたときに、伸長または破断する繊維が用いられる。また、所定温度で加熱して拡径される管路補修部材10の場合には、芯糸22は、拡径時に伸長または破断し易いように、その所定温度(加熱温度)以下の軟化温度を有する繊維によって形成されることが好ましい。ただし、芯糸22は、後述する管路補修部材10の製造において管本体12内に補強繊維14が周方向に巻回されるときに、鞘糸24の螺旋形状を保持する必要があるので、少なくともそのための強度を有する。なお、芯糸22を形成する繊維は、後述する鞘糸24を形成する高強度繊維と比較して、低強度または高伸度を有する一般的な繊維を用いるので、以下、芯糸22を形成する繊維を一般繊維と呼ぶことがある。   The core yarn 22 expands or breaks when the diameter of the pipe repair member 10 is expanded during construction. That is, as the fiber forming the core yarn 22, a fiber that expands or breaks under the conditions for expanding the diameter of the pipe repair member 10 is used. As an example, the diameter is expanded by heating at a predetermined temperature (usually, the heating temperature is set to a temperature at which the thermoplastic resin forming the tube wall of the tube body 12 starts to soften) and pressurization at a predetermined pressure. In the case of the pipe repair member 10, as the fiber forming the core yarn 22, a pressure of about 0.05 to 0.5 MPa is applied under the diameter expansion condition, for example, at a high temperature of about 90 to 100 ° C. Fibers that stretch or break when used are used. In the case of the pipe repair member 10 that is heated and expanded at a predetermined temperature, the core yarn 22 has a softening temperature equal to or lower than the predetermined temperature (heating temperature) so that the core yarn 22 is easily stretched or broken during the diameter expansion. It is preferable to form with the fiber which has. However, since the core yarn 22 needs to maintain the spiral shape of the sheath yarn 24 when the reinforcing fiber 14 is wound in the circumferential direction in the pipe body 12 in the manufacture of the pipe line repair member 10 described later, At least it has the strength. In addition, since the fiber which forms the core yarn 22 uses the general fiber which has low intensity | strength or high elongation compared with the high strength fiber which forms the sheath yarn 24 mentioned later, the core yarn 22 is formed hereafter. The fibers that do this are sometimes called general fibers.

具体的には、芯糸22を形成する一般繊維としては、合成繊維、無機繊維および天然繊維などのいずれを用いてもよく、ポリアミド系繊維、ポリオレフィン系繊維、ポリエステル系繊維、ポリ塩化ビニル系繊維、ポリビニルアルコール系繊維、ポリアクリロニトリル系繊維およびポリウレタン系繊維などの合成繊維、セルロース系繊維などの半合成繊維、綿、麻および羊毛などの天然繊維を例示でき、これらを単独で、或いは2種類以上を混合する等して用いることができる。この中でも特に、ポリアミド系繊維またはポリエステル系繊維が好ましい。また、これらの繊維は、長繊維を用いてもよいし、短繊維を用いてもよい。   Specifically, as the general fiber forming the core yarn 22, any of synthetic fiber, inorganic fiber, natural fiber, and the like may be used. Polyamide fiber, polyolefin fiber, polyester fiber, polyvinyl chloride fiber And synthetic fibers such as polyvinyl alcohol fibers, polyacrylonitrile fibers and polyurethane fibers, semi-synthetic fibers such as cellulosic fibers, and natural fibers such as cotton, hemp and wool. These may be used alone or in combination of two or more. Can be used by mixing them. Of these, polyamide fibers or polyester fibers are particularly preferable. Further, these fibers may be long fibers or short fibers.

鞘糸24は、拡径後(施工後)の管路補修部材10或いは管本体12の強度および耐圧性を保持(補強)するものであり、高強度繊維によって形成される。ここで、高強度繊維とは、10cN/dtex以上の引張強度を有する繊維をいい、少なくとも管路補修部材10を拡径するときの条件において、伸長または破断しない繊維である。また、所定温度で加熱して拡径される管路補修部材10の場合には、鞘糸24は、その所定温度(加熱温度)よりも高い軟化温度を有する繊維によって形成される。   The sheath yarn 24 retains (reinforces) the strength and pressure resistance of the pipe repair member 10 or the pipe body 12 after diameter expansion (after construction), and is formed of high-strength fibers. Here, the high-strength fiber refers to a fiber having a tensile strength of 10 cN / dtex or more, and is a fiber that does not stretch or break at least under the conditions for expanding the pipe repair member 10. Further, in the case of the pipe repair member 10 that is heated and expanded at a predetermined temperature, the sheath yarn 24 is formed of fibers having a softening temperature higher than the predetermined temperature (heating temperature).

具体的には、鞘糸24を形成する高強度繊維としては、芳香族ポリアミド繊維、ガラス繊維、炭素繊維、芳香族ポリエステル繊維、ポリパラフェニレンベンズビスオキサゾール繊維(PBO繊維)および超高分子量ポリエチレン繊維などを用いることができる。なお、これらの高強度繊維は、長繊維を用いてもよいし、短繊維を用いてもよい。   Specifically, the high-strength fibers forming the sheath yarn 24 include aromatic polyamide fibers, glass fibers, carbon fibers, aromatic polyester fibers, polyparaphenylene benzbisoxazole fibers (PBO fibers), and ultrahigh molecular weight polyethylene fibers. Etc. can be used. These high-strength fibers may be long fibers or short fibers.

このような補強繊維14は、たとえば、1または複数本の一般繊維に下撚りを加えて芯糸22とすると共に、1または複数本の高強度繊維に下撚りを加えて鞘糸24とし、両者を合わせて上撚りを加えることで芯糸22の外面に鞘糸24が螺旋状に巻き付いた複合糸とすることによって製作される。このような補強繊維14の製作には、公知の撚糸機を用いることができる。なお、芯糸22および鞘糸24における下撚りは、必ずしも行う必要はない。たとえば、芯糸22は、管本体12内に補強繊維14を螺旋状に配置するときに、鞘糸24の螺旋形状を保持する強度を有すればよいので、モノフィラメントを用いてもよい。一方、高強度が求められる鞘糸24に関しては、複数本の高強度繊維に下撚りを加えて形成することが好ましい。   Such a reinforcing fiber 14 is, for example, a core yarn 22 by adding a lower twist to one or a plurality of general fibers, and a sheath yarn 24 by adding a lower twist to one or a plurality of high-strength fibers. Are combined into a composite yarn in which the sheath yarn 24 is spirally wound around the outer surface of the core yarn 22. A known twisting machine can be used for manufacturing such a reinforcing fiber 14. It is not always necessary to perform the lower twisting in the core yarn 22 and the sheath yarn 24. For example, the core yarn 22 may be a monofilament, as long as it has the strength to maintain the helical shape of the sheath yarn 24 when the reinforcing fibers 14 are arranged in a spiral shape in the tube body 12. On the other hand, the sheath yarn 24 that requires high strength is preferably formed by adding a lower twist to a plurality of high-strength fibers.

補強繊維14の太さ(繊度)は、芯糸22および鞘糸24を形成する繊維の種類によって異なるが、たとえば補強繊維14全体で1000−20000dtexである。また、芯糸22全体では、たとえば500−10000dtexであり、鞘糸24全体では、たとえば500−10000dtexである。また、補強繊維14の撚り加工条件は、補強繊維14に求められる特性に応じて適宜設計可能であるが、下記の数式(数1)で表される撚り係数kが0.4−10.4の範囲であることが好ましく、2.0−7.5の範囲であることがより好ましい。   The thickness (fineness) of the reinforcing fiber 14 varies depending on the types of fibers forming the core yarn 22 and the sheath yarn 24, but is, for example, 1000-20000 dtex for the entire reinforcing fiber 14. The entire core yarn 22 is, for example, 500-10000 dtex, and the entire sheath yarn 24 is, for example, 500-10000 dtex. In addition, the twisting condition of the reinforcing fiber 14 can be appropriately designed according to the characteristics required for the reinforcing fiber 14, but the twist coefficient k represented by the following formula (Equation 1) is 0.4-10. Is preferable, and the range of 2.0-7.5 is more preferable.

Figure 2012250452
Figure 2012250452

ここで、kは撚り係数を示し、Tmは撚り数[回/m]を示す。また、Dは繊度[dtex]を示し、ρは繊維素材の密度[g/cm3]を示す。 Here, k represents a twist coefficient, and Tm represents the number of twists [times / m]. D indicates the fineness [dtex], and ρ indicates the density [g / cm 3 ] of the fiber material.

図5は、管路補修部材10の拡径時における補強繊維10の変化の様子(動作)の一例を模式的に示す図である。たとえば、施工時において管路補修部材10を拡径するときには、管路補修部材10は、蒸気または熱水などによって、90−100℃程度に加熱されると共に、0.05−0.5MPa程度の内圧が加えられる。つまり、管路補修部材10の拡径時には、補強繊維22は加熱されると共に、周方向に伸びる力が補強繊維22に作用する。このとき、芯糸22は、加熱によって低強度化して、或いは元々有する低強度または高伸度の性質により、加圧によって伸長する。一方、芯糸22に巻き付けた(螺旋形状であった)鞘糸24は、この芯糸22の伸長に伴って、管路補修部材10の周方向に対して真っ直ぐに伸びるように変形していく。なお、管路補修部材10は、加熱してから機械的に拡径される場合もある。また、管路補修部材10は、加熱せずに機械的に拡径される場合もあり、この場合には、芯糸22は、元々有する低強度または高伸度の性質により、管路補修部材10の機械的拡径によって伸長し、鞘糸24は、その芯糸22の伸長に伴って変形する。   FIG. 5 is a diagram schematically illustrating an example of a change state (operation) of the reinforcing fiber 10 when the diameter of the pipe repair member 10 is expanded. For example, when expanding the diameter of the pipe repair member 10 at the time of construction, the pipe repair member 10 is heated to about 90-100 ° C. by steam or hot water, and is about 0.05-0.5 MPa. Internal pressure is applied. That is, when the diameter of the pipe repair member 10 is expanded, the reinforcing fiber 22 is heated and a force extending in the circumferential direction acts on the reinforcing fiber 22. At this time, the core yarn 22 is reduced in strength by heating, or is stretched by pressurization due to the inherently low strength or high elongation property. On the other hand, the sheath yarn 24 wound around the core yarn 22 (having a spiral shape) is deformed so as to extend straight with respect to the circumferential direction of the pipe repair member 10 as the core yarn 22 extends. . The pipe repair member 10 may be mechanically expanded in diameter after being heated. Further, the pipe repair member 10 may be mechanically expanded without being heated. In this case, the core yarn 22 has a low-strength or high-extension property that is inherent to the pipe repair member. The sheath yarn 24 is deformed as the core yarn 22 is elongated.

図5に示すような挙動を管路補修部材10の拡径時に補強繊維10が示すので、管路補修部材10は、補強繊維14を有しながらも拡径可能となる。また、鞘糸24が管路補修部材10の周方向に対して真っ直ぐになった状態(張った状態)になると、鞘糸24の強度が作用するので、管路補修部材10は、それ以上拡径しない。つまり、管路補修部材10の拡径時の最大径は、鞘糸24の周当たりの実効長(軸垂直方向の長さまたは断面投影長さ)によって規定される。なお、図5では、一例として芯糸22が伸長のみする様子を示しているが、芯糸22は、伸長すると共に破断してもよいし、伸長せずに破断のみしてもよい。また、芯糸22が伸長または破断して鞘糸24が真っ直ぐになる態様には、鞘糸24が芯糸22に食い込むようにして、芯糸22の内部を通って(貫いて)鞘糸24が真っ直ぐになることもあり得る。   Since the reinforcing fiber 10 exhibits the behavior as shown in FIG. 5 when the diameter of the pipe repair member 10 is expanded, the pipe repair member 10 can be expanded in diameter while having the reinforcing fiber 14. In addition, when the sheath thread 24 is straightened (stretched) with respect to the circumferential direction of the pipe repair member 10, the strength of the sheath thread 24 acts, so that the pipe repair member 10 is further expanded. Not diameter. That is, the maximum diameter when the diameter of the pipe repair member 10 is expanded is defined by the effective length (the length in the direction perpendicular to the axis or the projected length of the cross section) per circumference of the sheath yarn 24. In FIG. 5, as an example, a state in which the core yarn 22 only expands is shown. However, the core yarn 22 may extend and break, or may not break but only break. Further, in a mode in which the core yarn 22 extends or breaks and the sheath yarn 24 becomes straight, the sheath yarn 24 penetrates into the core yarn 22 so that the sheath yarn 24 bites into the core yarn 22. Can be straight.

なお、補強繊維14の伸び率(延いては管路補修部材10の拡径率)は、たとえば5−15%に設定される。これは、補強繊維14の伸び率が5%よりも小さいと、既設管路100の曲管部や屈曲部などへの追従(密着)が困難になるからであり、補強繊維14の伸び率が15%よりも大きいと、均一な拡径が困難になる(局部的に伸びてしまう)からである。また、補強繊維14の伸び率または管路補修部材10の拡径率は、補強繊維14の太さ(特に芯糸22の太さ)および撚り数を変更することで、適宜調整可能である。たとえば、芯糸22および鞘糸24の繊度を一定とし、それぞれの下撚り数や上撚り数を変更することで、図6に示すように補強繊維14の伸び率を調整することが可能である。   In addition, the elongation rate of the reinforcing fiber 14 (and the diameter expansion rate of the pipe repair member 10) is set to, for example, 5-15%. This is because if the elongation rate of the reinforcing fiber 14 is smaller than 5%, it is difficult to follow (adhere) the curved pipe portion or the bent portion of the existing pipe line 100. This is because when the ratio is larger than 15%, uniform diameter expansion becomes difficult (local expansion). Further, the elongation rate of the reinforcing fibers 14 or the diameter expansion rate of the pipe repair member 10 can be appropriately adjusted by changing the thickness of the reinforcing fibers 14 (particularly the thickness of the core yarn 22) and the number of twists. For example, by making the fineness of the core yarn 22 and the sheath yarn 24 constant and changing the number of lower twists and the number of upper twists, it is possible to adjust the elongation rate of the reinforcing fibers 14 as shown in FIG. .

次に、管路補修部材10の製造方法について説明する。図7は、管路補修部材10を製造する製造装置50の一例を示す。製造装置50は、第1押出機52、巻付機54および第2押出機56を備え、管路補修部材10を連続的に製造する。   Next, a method for manufacturing the pipe repair member 10 will be described. FIG. 7 shows an example of a manufacturing apparatus 50 that manufactures the pipe repair member 10. The manufacturing apparatus 50 includes a first extruder 52, a winding machine 54, and a second extruder 56, and continuously manufactures the pipe repair member 10.

製造装置50では、先ず、第1押出機52が溶融した硬質ポリエチレン等の熱可塑性樹脂を円筒状に押し出して内層18を形成し、形成した内層18を巻付機54に送り出す。巻付機54は、形成した内層18の外側で同軸に回転する回転胴58を有しており、この回転胴58には斜め方向に延びる支持軸60が固定され、支持軸60の先端には補強繊維14が巻かれたボビン62が回転可能に支持される。巻付機54は、回転胴58を回転させながらボビン62から補強繊維14を解除することによって、第1押出機52から送り出された内層18の外面に対して、補強繊維14を巻き付けていく。その後、第2押出機56が補強繊維14の外側に溶融した硬質ポリエチレン等の熱可塑性樹脂を被覆して外層20を形成することによって、管路補修部材10が製造される。   In the manufacturing apparatus 50, first, a thermoplastic resin such as hard polyethylene melted by the first extruder 52 is extruded into a cylindrical shape to form the inner layer 18, and the formed inner layer 18 is sent to the winding machine 54. The winding machine 54 has a rotating drum 58 that rotates coaxially outside the formed inner layer 18, and a support shaft 60 that extends in an oblique direction is fixed to the rotating drum 58. The bobbin 62 around which the reinforcing fiber 14 is wound is supported rotatably. The winding machine 54 winds the reinforcing fiber 14 around the outer surface of the inner layer 18 fed from the first extruder 52 by releasing the reinforcing fiber 14 from the bobbin 62 while rotating the rotary drum 58. Thereafter, the second extruder 56 coats a thermoplastic resin such as hard polyethylene melted on the outside of the reinforcing fiber 14 to form the outer layer 20, whereby the pipe repair member 10 is manufactured.

なお、内層18の外面に対して補強繊維14を巻き付ける際には、第1押出機52から送り出される内層18に対してそのまま補強繊維14を巻き付けてもよいし、内層18の外面に対して接着剤を塗布してから補強繊維14を巻き付けてもよい。また、内層18の外面を加熱軟化させ、補強繊維14を内層18に食い込ませるようにして巻き付けてもよい。また、補強繊維14に外層20を被覆する際には、溶融した熱可塑性樹脂が補強繊維14間に充填されて中間層16の一部を形成してもよい。   When the reinforcing fiber 14 is wound around the outer surface of the inner layer 18, the reinforcing fiber 14 may be wound around the inner layer 18 fed from the first extruder 52 as it is, or bonded to the outer surface of the inner layer 18. The reinforcing fiber 14 may be wound after the agent is applied. Further, the outer surface of the inner layer 18 may be softened by heating, and the reinforcing fiber 14 may be wound around the inner layer 18. Further, when covering the reinforcing fiber 14 with the outer layer 20, a molten thermoplastic resin may be filled between the reinforcing fibers 14 to form a part of the intermediate layer 16.

続いて、管路補修部材10を用いた既設管路100の補修方法の一例について説明する。管路補修部材10は、上述のように、内圧が作用する地下埋設の既設管路100の補修に好適に用いられる。   Then, an example of the repair method of the existing pipeline 100 using the pipeline repair member 10 is demonstrated. As described above, the pipe repair member 10 is suitably used for repairing the existing underground pipe line 100 in which the internal pressure acts.

既設管路100を補修する際には、先ず、補修対象とする既設管路100の両端部(始点および終点)に立坑を掘削して、その掘削した立坑の近辺に、蒸気発生装置やウインチなどの施工に必要な各種装置および管路補修部材10などを準備する。管路補修部材10は、たとえば、偏平させた状態で、ドラムに巻き付けられて施工現場に搬入される。   When repairing the existing pipe line 100, first, a shaft is excavated at both ends (starting point and end point) of the existing pipe line 100 to be repaired, and a steam generator, a winch, or the like is provided near the excavated shaft. Various devices necessary for the construction and the pipe repair member 10 are prepared. The pipe repair member 10 is wound around a drum and carried into a construction site, for example, in a flattened state.

次に、既設管路100内へ管路補修部材10を引き込み易いように、管路補修部材10を予備加熱によって軟化させ、その軟化させた状態で、牽引ワイヤやウインチ等を用いて、既設管路100内に管路補修部材10を挿通していく(図1(A)参照)。そして、既設管路100の補修対象の全長に亘って管路補修部材10が挿通されると、管路補修部材10内に蒸気(または熱水)を供給して、管路補修部材10を90−100℃程度に加熱する共に、0.05−0.5MPa程度の内圧を加える。すると、管路補修部材10は、内面側から十分に加熱軟化されて円筒状に復元するとともに(図1(B)参照)、加圧によって拡径し、既設管路100の内面全体に管路補修部材10の外面が密着する(図1(C)参照)。このとき、補強繊維14の芯糸22は、たとえば加熱によって低強度化して、加圧によって容易に伸長または破断する。そして、芯糸22の伸長または破断に伴い、鞘糸24が管路補修部材10の周方向に沿って真っ直ぐになることで(図5参照)、管路補修部材10は、補強繊維14によって補強しながらも周方向に拡径可能となるのである。   Next, the pipe repair member 10 is softened by preheating so that the pipe repair member 10 can be easily pulled into the existing pipe 100, and in the softened state, the existing pipe is used by using a pulling wire, a winch or the like. The pipe repair member 10 is inserted into the path 100 (see FIG. 1A). When the pipe repair member 10 is inserted over the entire length of the existing pipe 100 to be repaired, steam (or hot water) is supplied into the pipe repair member 10, and the pipe repair member 10 is moved to 90. While heating to about −100 ° C., an internal pressure of about 0.05 to 0.5 MPa is applied. Then, the pipe repair member 10 is sufficiently heated and softened from the inner surface side and restored to a cylindrical shape (see FIG. 1B), and the diameter is expanded by pressurization, and the pipe line is formed on the entire inner surface of the existing pipe line 100. The outer surface of the repair member 10 is in close contact (see FIG. 1C). At this time, the core yarn 22 of the reinforcing fiber 14 is reduced in strength by heating, for example, and easily stretched or broken by pressurization. Then, as the core yarn 22 extends or breaks, the sheath yarn 24 becomes straight along the circumferential direction of the pipeline repair member 10 (see FIG. 5), so that the pipeline repair member 10 is reinforced by the reinforcing fibers 14. However, the diameter can be increased in the circumferential direction.

既設管路100に管路補修部材10を拡径密着させると、内圧を保持した状態で、管路補修部材10内に冷却空気などを供給して、管路補修部材10を冷却固化させる。その後、管端処理などを適宜行うことによって、管路補修部材10を用いた既設管路100の補修が終了する。このように既設管路100と密着して一体化した管路補修部材10は、既設管路100と協働して、内部流体からの内圧および土砂などからの外圧に耐え得る強度および耐圧性を発揮する。たとえば、内圧であれば4MPa程度の短期強度が確保できる。   When the diameter of the pipe repair member 10 is brought into close contact with the existing pipe 100, cooling air or the like is supplied into the pipe repair member 10 with the internal pressure maintained, and the pipe repair member 10 is cooled and solidified. After that, by repairing the pipe end appropriately, the repair of the existing pipe line 100 using the pipe line repair member 10 is completed. In this way, the pipe repair member 10 in close contact with and integrated with the existing pipe line 100 cooperates with the existing pipe line 100 to have strength and pressure resistance that can withstand the internal pressure from the internal fluid and the external pressure from the earth and sand. Demonstrate. For example, a short-term strength of about 4 MPa can be secured with an internal pressure.

この実施例によれば、補強繊維14によって補強しながらも周方向に拡径可能な管路補修部材10を提供できる。また、円筒状に織った補強繊維を製作する必要がないので、コストを低減でき、口径の大きい補修管路部材10も比較的容易に製造できる。   According to this embodiment, it is possible to provide the pipe repair member 10 that can be expanded in the circumferential direction while being reinforced by the reinforcing fibers 14. Further, since it is not necessary to manufacture reinforcing fibers woven in a cylindrical shape, the cost can be reduced and the repair conduit member 10 having a large diameter can be manufactured relatively easily.

また、拡径させることが可能であるため、補修管路部材10は適度な屈曲性を有する。したがって、補修管路部材10は、既設管路100内に挿入し易く、曲管部にも対応可能となる。   Further, since the diameter can be increased, the repair conduit member 10 has appropriate flexibility. Therefore, the repair pipeline member 10 can be easily inserted into the existing pipeline 100 and can be adapted to a curved pipe portion.

さらに、管路補修部材10の拡径後の外径寸法の調整が可能であるので、既設管路100の内面に対して適切に密着させることができる。また、管路補修部材10の拡径後(施工後)は、補強繊維14の鞘糸24が内部流体の内圧を支えるので、内層18および外層20の厚みを薄くでき、管路補修部材10の薄肉化を図ることができる。   Furthermore, since the outer diameter of the pipe repair member 10 after the diameter expansion can be adjusted, the pipe repair member 10 can be appropriately brought into close contact with the inner surface of the existing pipe 100. Moreover, since the sheath yarn 24 of the reinforcing fiber 14 supports the internal pressure of the internal fluid after the diameter of the pipe repair member 10 is expanded (after construction), the thickness of the inner layer 18 and the outer layer 20 can be reduced. Thinning can be achieved.

なお、上述の実施例では、棒状の芯糸22に鞘糸24を巻き付けた補強繊維14を用いたが、これに限定されず、補強繊維14は、芯糸22を螺旋状に形成し、その芯糸22の外面に沿って鞘糸24が螺旋状に延びるように形成する、つまり芯糸22と鞘糸24とが相互に巻き付くようにすることもできる。ただし、補強繊維14の伸び易さを考慮すると、芯糸22は棒状であることが好ましい。   In the above-described embodiment, the reinforcing fiber 14 in which the sheath thread 24 is wound around the rod-shaped core thread 22 is used. However, the present invention is not limited thereto, and the reinforcing fiber 14 is formed by forming the core thread 22 in a spiral shape. The sheath yarn 24 may be formed to extend spirally along the outer surface of the core yarn 22, that is, the core yarn 22 and the sheath yarn 24 may be wound around each other. However, considering the easiness of elongation of the reinforcing fiber 14, the core yarn 22 is preferably rod-shaped.

また、上述の実施例では、補強繊維14は、管路補強部材10の管軸方向の1方向のみに螺旋状に延びるようにしたが、図8に示す他の実施例のように、補強繊維14は、管軸方向の2方向に螺旋状に延びてもよい。つまり、補強繊維14は、内外の2層に螺旋状に延びる2方向巻き或いは左右巻きであってもよい。なお、補強繊維14は、3層以上に形成してもよい。これによって、管路補修部材10の強度および耐圧性を向上させることができる。   Further, in the above-described embodiment, the reinforcing fiber 14 extends spirally in only one direction of the pipe reinforcing member 10 in the tube axis direction. However, as in the other embodiments shown in FIG. 14 may extend spirally in two directions in the tube axis direction. That is, the reinforcing fiber 14 may be a two-way winding or a left-right winding that extends in a spiral manner in two layers inside and outside. The reinforcing fiber 14 may be formed in three or more layers. As a result, the strength and pressure resistance of the pipe repair member 10 can be improved.

さらに、上述の実施例では、補強繊維14を含む中間層16の内面および外面を、熱可塑性樹脂によって形成される内層18および外層20によって被覆した三層構造を有するようにしたが、外層20は必ずしも形成する必要はない。すなわち、管路補修部材10は、管本体12の管壁外面に補強繊維14を周方向に巻回した二層構造とすることもできる。なお、二層構造の管路補修部材10を製造する場合には、上述の管路補修部材10の製造方法において、外層20を形成する工程が省略される。   Further, in the above-described embodiment, the inner layer 16 and the outer surface of the intermediate layer 16 including the reinforcing fibers 14 have a three-layer structure covered with the inner layer 18 and the outer layer 20 formed of the thermoplastic resin. It does not necessarily have to be formed. That is, the pipe line repairing member 10 can also have a two-layer structure in which the reinforcing fibers 14 are wound around the pipe wall outer surface of the pipe body 12 in the circumferential direction. In addition, when manufacturing the pipe repair member 10 of a two-layer structure, the process of forming the outer layer 20 is abbreviate | omitted in the manufacturing method of the pipe repair member 10 mentioned above.

また、図9に示す他の実施例のように、補強繊維14を用いて補強繊維シート30を形成し、その補強繊維シート30を周方向に巻回させることによって、管本体12の管壁内部または管壁外面に補強繊維14を周方向に巻回させることもできる。補強繊維シート30としては、たとえば、ナイロンやポリエステルなどの芯糸22と同様の材料を用いてフィルムや不織布などの保持シートを作成し、その保持シートの長尺方向に延びるように補強繊維14を貼り付けたものを用いることもできるし、少なくとも経糸の一部に補強繊維14を使用して平織りしたものを用いることもできる。   Further, as in another embodiment shown in FIG. 9, the reinforcing fiber sheet 30 is formed using the reinforcing fiber 14, and the reinforcing fiber sheet 30 is wound in the circumferential direction, so that the inside of the tube wall of the tube main body 12 can be obtained. Alternatively, the reinforcing fibers 14 can be wound around the outer surface of the tube wall in the circumferential direction. As the reinforcing fiber sheet 30, for example, a holding sheet such as a film or a non-woven fabric is prepared using the same material as the core yarn 22 such as nylon or polyester, and the reinforcing fiber 14 is extended so as to extend in the longitudinal direction of the holding sheet. Attached ones can be used, and at least part of the warp yarns can be woven in plain using the reinforcing fibers 14.

また、図10に示す他の実施例のように、管本体12の管壁内部または管壁外面には、螺旋状に延びる補強繊維14に加えて、高強度繊維によって形成される1または複数の高強度糸32を管軸方向に直線状に延びるように配置することもできる。高強度糸32は、たとえば、鞘糸24と同様に、芳香族ポリアミド繊維などの高強度繊維の複数本を撚り合わせることによって形成するとよい。なお、高強度糸32は、補強繊維14(または補強繊維シート30)の内側に配置されてもよいし、外側に配置されてもよい。このように高強度糸32を設けることによって、管路補修部材10の管軸方向の伸びが規制されるので、管路補修部材10は、既設管路100内に引き込まれる際に、破断し難い構造となることができる。   Further, as in another embodiment shown in FIG. 10, one or a plurality of high-strength fibers are formed in the tube wall of the tube main body 12 or on the outer surface of the tube wall in addition to the reinforcing fibers 14 that spirally extend. It is also possible to arrange the high-strength yarn 32 so as to extend linearly in the tube axis direction. The high-strength yarn 32 may be formed, for example, by twisting a plurality of high-strength fibers such as aromatic polyamide fibers, like the sheath yarn 24. The high-strength yarn 32 may be disposed inside the reinforcing fiber 14 (or the reinforcing fiber sheet 30) or may be disposed outside. By providing the high-strength yarn 32 in this way, the expansion of the pipe repair member 10 in the pipe axis direction is restricted, so that the pipe repair member 10 is difficult to break when pulled into the existing pipe 100. Can be a structure.

なお、上で挙げた寸法などの具体的数値は、いずれも単なる一例であり、製品の仕様などの必要に応じて適宜変更可能である。   It should be noted that the specific numerical values such as the dimensions mentioned above are merely examples, and can be appropriately changed according to the needs of product specifications and the like.

10 …管路補修部材
12 …管本体
14 …補強繊維
16 …中間層
18 …内層
20 …外層
22 …芯糸
24 …鞘糸
30 …補強繊維シート
32 …高強度糸
50 …管路補修部材の製造装置
100 …既設管路
DESCRIPTION OF SYMBOLS 10 ... Pipe line repair member 12 ... Pipe main body 14 ... Reinforcing fiber 16 ... Intermediate layer 18 ... Inner layer 20 ... Outer layer 22 ... Core thread 24 ... Sheath thread 30 ... Reinforcing fiber sheet 32 ... High-strength thread 50 ... Manufacture of pipe repair member Device 100 ... Existing pipeline

Claims (8)

既設管路内に挿通された後、拡径されて前記既設管路の内面に密着される管路補修部材であって、
熱可塑性樹脂によって形成される管本体、および
前記管本体の管壁部に配置されて、当該管本体の周方向に巻回される補強繊維を備え、
前記補強繊維は、
前記拡径時に伸長または破断する芯糸、および
高強度繊維によって形成され、前記芯糸の外面に巻き付けられる鞘糸を含む、管路補修部材。
After being inserted into the existing pipeline, the pipeline repair member is expanded in diameter and is in close contact with the inner surface of the existing pipeline,
A tube main body formed of a thermoplastic resin, and a reinforcing fiber that is disposed on the tube wall portion of the tube main body and wound in the circumferential direction of the tube main body,
The reinforcing fiber is
A conduit repair member comprising: a core yarn that extends or breaks when the diameter is expanded; and a sheath yarn that is formed of high-strength fibers and is wound around an outer surface of the core yarn.
前記拡径時の最大径が、前記鞘糸の周当たりの実効長によって規定される、請求項1記載の管路補修部材。   The pipe repair member according to claim 1, wherein a maximum diameter when the diameter is expanded is defined by an effective length per circumference of the sheath yarn. 前記管路補修部材は、所定温度で加熱して前記拡径を行うものであり、
前記芯糸の軟化温度は、前記所定温度以下であり、
前記鞘糸の軟化温度は、前記所定温度より高い、請求項1または2記載の管路補修部材。
The pipe repair member is heated at a predetermined temperature to expand the diameter,
The softening temperature of the core yarn is not more than the predetermined temperature,
The conduit repair member according to claim 1 or 2, wherein a softening temperature of the sheath yarn is higher than the predetermined temperature.
前記補強繊維は、前記管本体の管軸方向に対して少なくとも内外2層に周方向に巻回される、請求項1ないし3のいずれかに記載の管路補修部材。   The pipe repair member according to any one of claims 1 to 3, wherein the reinforcing fiber is wound in a circumferential direction in at least two inner and outer layers with respect to a pipe axis direction of the pipe main body. 前記補強繊維は、シート状に形成された後に前記管本体の管壁部に配置される、請求項1ないし4のいずれかに記載の管路補修部材。   The pipe repair member according to claim 1, wherein the reinforcing fiber is formed in a sheet shape and then disposed on a pipe wall portion of the pipe main body. 前記管本体の管壁部に配置されて、管軸方向に延びる高強度糸をさらに備える、請求項1ないし5のいずれかに記載の管路補修部材。   The pipe line repair member according to any one of claims 1 to 5, further comprising a high-strength yarn disposed on a pipe wall portion of the pipe body and extending in a pipe axis direction. 請求項1ないし6のいずれかの管路補修部材を用いて内面を補修した、管路。   A pipe line whose inner surface is repaired by using the pipe line repair member according to claim 1. 既設管路内に挿通された後、拡径されて前記既設管路の内面に密着される管路補修部材の製造方法であって、
(a)前記拡径時に伸長または破断する芯糸と、高強度繊維によって形成されて前記芯糸の外面に巻き付けられる鞘糸とによって形成される補強繊維を製作するステップ、
(b)熱可塑性樹脂によって形成される円筒状の内層を形成するステップ、
(c)前記ステップ(a)で製作した補強繊維を前記ステップ(b)で形成した内層の外面に周方向に巻回すステップを含む、管路補修部材の製造方法。
A method of manufacturing a pipe repair member that is inserted into an existing pipe line, then expanded in diameter and is in close contact with the inner surface of the existing pipe line,
(A) producing a reinforcing fiber formed by a core yarn that expands or breaks when the diameter is expanded and a sheath yarn that is formed by high-strength fibers and is wound around the outer surface of the core yarn;
(B) forming a cylindrical inner layer formed of a thermoplastic resin;
(C) A method of manufacturing a pipe repair member, including a step of winding the reinforcing fiber manufactured in the step (a) around the outer surface of the inner layer formed in the step (b) in the circumferential direction.
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CN103950261A (en) * 2014-04-19 2014-07-30 湖南振辉管业有限公司 Special system and technical process for manufacturing integrated body of main pipes and secondary pipes
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JPWO2018084122A1 (en) * 2016-11-07 2019-09-19 株式会社ブリヂストン Hydraulic actuator
JPWO2019087267A1 (en) * 2017-10-30 2020-11-19 株式会社ブリヂストン Pneumatic actuator
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Publication number Priority date Publication date Assignee Title
CN103950261A (en) * 2014-04-19 2014-07-30 湖南振辉管业有限公司 Special system and technical process for manufacturing integrated body of main pipes and secondary pipes
JP2016098924A (en) * 2014-11-25 2016-05-30 芦森工業株式会社 Pipe passage and its lining method
JPWO2018084122A1 (en) * 2016-11-07 2019-09-19 株式会社ブリヂストン Hydraulic actuator
JPWO2019087267A1 (en) * 2017-10-30 2020-11-19 株式会社ブリヂストン Pneumatic actuator
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JP2020204212A (en) * 2019-06-18 2020-12-24 鹿島建設株式会社 Linear body installation device, and linear body installation method
JP7209295B2 (en) 2019-06-18 2023-01-20 鹿島建設株式会社 LINEAR OBJECT INSTALLATION DEVICE AND LINEAR OBJECT INSTALLATION METHOD
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